DJI Mavic, Air and Mini Drones
Friendly, Helpful & Knowledgeable Community
Join Us Now

Batteries warm after week of storage

JERM77

Member
Joined
Dec 31, 2016
Messages
8
Reactions
5
Age
44
Hello folks,

I wanted to see if anyone else has expetienced battery warmth after charging then storing for two weeks.

Charged my mavic pro batteries, 3 of them, two weeks ago. Packed in tight fitting lipo bags and inserted into a snug fitting pelican case.

2 of the 3 batteries felt pretty warm when I pulled them for the pelican and lipo bags, the last battery was cool to room temperature.

Could the button on the battery being depressed constantly do this? Could the lipo and pelican cases insulated this for more than two weeks?
Could the 3d printed battery contact covers I have caused this?

The batteries look fully charged. I'll preform a flight later today.

Should I be concerned? And other ideas or suggestions?

Thanks.
 
  • Like
Reactions: Tok Pilot

Mad_Angler1

Well-Known Member
Joined
Oct 16, 2016
Messages
213
Reactions
158
Location
UK
The batteries have entered self discharge, you should not store them fully charged for long periods of time , if you do after a preset period (default is 10 days) they will begin to self discharge them selves to below 65%, while this happens they will get warm, I suspect they have just started hens the lights have not dropped yet, by pressing the button you now have reset that timer and self discharge has stopped, you should fully charge them before you fly again. .

You can adjust the self discharge time in the Go App under the battery settings from 1-10 days.

You really should not leave these packs fully charged for any longer than 24 hours and fly them asap after charging.


Sent from my iPhone using MavicPilots
 
Last edited:

rfc0001

Well-Known Member
Joined
Dec 26, 2016
Messages
89
Reactions
46
What he said - the only way to discharge energy statically is to throw off heat.


Sent from my iPhone using Tapatalk
 

CactusJackSlade

Well-Known Member
Joined
Oct 17, 2016
Messages
1,043
Reactions
811
Yeah, I do worry just a bit.... when you have 3 or so batteries in an insulated case I wonder about combustibility.... I pulled mine out and they were definitely warm!
 

JERM77

Member
Joined
Dec 31, 2016
Messages
8
Reactions
5
Age
44
Thanks guys! I'll make it a habit of not storing fully charged batteries.
 

m0j0

Well-Known Member
Joined
Oct 12, 2016
Messages
1,320
Reactions
623
Location
Washington D.C.
Your batteries are auto discharging to prevent damage. My rule is I charge then fly. I don't charge unless I'm going to fly and if I do charge I make it a goal to discharge the battery at least to 50% within 3 days.
 
  • Like
Reactions: Vilco and BigAl07

Oyibo VFX

Well-Known Member
Joined
Jan 26, 2017
Messages
1,013
Reactions
363
Age
61
Location
Edo State, Nigeria (for the moment)
Hello folks,

I wanted to see if anyone else has expetienced battery warmth after charging then storing for two weeks.

Charged my mavic pro batteries, 3 of them, two weeks ago. Packed in tight fitting lipo bags and inserted into a snug fitting pelican case.

2 of the 3 batteries felt pretty warm when I pulled them for the pelican and lipo bags, the last battery was cool to room temperature.

Could the button on the battery being depressed constantly do this? Could the lipo and pelican cases insulated this for more than two weeks?
Could the 3d printed battery contact covers I have caused this?

The batteries look fully charged. I'll preform a flight later today.

Should I be concerned? And other ideas or suggestions?

Thanks.

RTFM (discharge to 20%)


Adventure is just bad planning
 

Tyson Sadlo

New Member
Joined
Sep 17, 2017
Messages
2
Reactions
1
Age
49
I had the same issue when I returned yesterday from being away for more than 10 days and this forum has really helped so thanks guys.
 

wombat

Well-Known Member
Joined
Oct 21, 2016
Messages
667
Reactions
155
Location
West Aust
did a search and found this thanks guys, I just found out that my batteries are warm, will change my habits and only charge them prior to flying.

what is the best way to discharge them ?

here is how my batteries are stored, are those white dirt stoppers ok to use ?

Mavic Pro storage.jpg
 

MAvic_South_Oz

Well-Known Member
Premium Pilot
Joined
May 25, 2017
Messages
7,783
Reactions
7,063
Age
60
Location
South Australia, the great southern land
what is the best way to discharge them ?

here is how my batteries are stored, are those white dirt stoppers ok to use ?

I either fly and discharge to whatever level, usually about 15 - 20% as for normal flights, sometimes if close flying I’ll let them go to 10%, but I worry a bit about leaving them too low.
If I’m concerned I’ll pop them on the charger to bring up to 1-1/2 to 2 bars charged.

You can just store them and let them auto charge.
The default is discharge after 10 days.
The lowest time period you can set them for is 5 days, that’s what I’ve set mine to.

AFAIK, the battery terminal guards are fine to leave on.
 

wombat

Well-Known Member
Joined
Oct 21, 2016
Messages
667
Reactions
155
Location
West Aust
Thanks MSO, printed you reply, now in my case for future use.
 

Aeronut45

Member
Joined
Apr 6, 2017
Messages
6
Reactions
10
Age
76
I either fly and discharge to whatever level, usually about 15 - 20% as for normal flights, sometimes if close flying I’ll let them go to 10%, but I worry a bit about leaving them too low.
If I’m concerned I’ll pop them on the charger to bring up to 1-1/2 to 2 bars charged.

You can just store them and let them auto charge.
The default is discharge after 10 days.
The lowest time period you can set them for is 5 days, that’s what I’ve set mine to.

AFAIK, the battery terminal guards are fine to leave on.

I have set my batteries to discharge after 5 days. The last time I charged them I only got to fly one, so the other 2 packs stayed charged. Then I got sick and had no chance to fly. This was more than 2 weeks ago. when I checked the batteries they still showed full ( 4 lights)after 14 days. Although I am still sick, I went to hover the Mavic in the backyard until they got down to 60 %. This is actually a storage charge percentage for lipoly's.
I have been flying lipoly's for many years, and any good Charger has got that storage charge function in it.
Not sure why my 2 packs didn't discharge, but I would recommend anyone who puts them away fully charged, check them if they really discharge after the set period of time. I do not trust mine for sure.
 
  • Like
Reactions: MAvic_South_Oz

wombat

Well-Known Member
Joined
Oct 21, 2016
Messages
667
Reactions
155
Location
West Aust
Aeronut45, thanks for the feedback, that is something for me to keep an eye on.
 

DJI Drone Deals

New Threads

Forum statistics

Threads
121,372
Messages
1,431,840
Members
149,054
Latest member
skaliontheway